The Butler County Sheriff’s Office said two men were arrested Wednesday following a traffic stop and a subsequent search warrant.

Deputies said during a routine traffic stop near the intersection of Fair and Hancock avenues in Hamilton they found a hypodermic needle, 13 ½ grams of heroin ready to be sold and $400 in cash inside William Mills’, 43, car.

The investigation of Mills led to a search warrant being executed at Mills’ home in the 100 block of West Fairway in Hamilton.

Authorities said the passenger in Mills’ car, Donald Leifheit, 44, was arrested on outstanding warrants and taken to Butler County Jail.

Sgt. Hackney of the BURN unit said most of their investigations are heroin related.“In most cases, when we find heroin, we find guns also, two very bad combinations,” said Hackney.

Authorities said Mills was charged with trafficking drugs, possession of drugs and possession of drug abuse instruments.

“The BURN Unit is doing a great job at getting these individuals and their illegal business off the street, and there will be more charges coming in this case. Heroin is an epidemic and I will continue to prosecute those possessing it and trying to sell it in this county,” Sheriff Richard Jones said.